mirror of
https://github.com/moparisthebest/xeps
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112 lines
5.2 KiB
XML
112 lines
5.2 KiB
XML
<?xml version='1.0' encoding='UTF-8'?>
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<!DOCTYPE xep SYSTEM 'xep.dtd' [
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<!ENTITY % ents SYSTEM 'xep.ent'>
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%ents;
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]>
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<?xml-stylesheet type='text/xsl' href='xep.xsl'?>
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<xep>
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<header>
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<title>Pubsub Signing: OpenPGP Profile</title>
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<abstract>Specifies a pubsub signing profile for OpenPGP</abstract>
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&LEGALNOTICE;
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<number>0476</number>
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<status>Experimental</status>
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<type>Standards Track</type>
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<sig>Standards</sig>
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<approver>Council</approver>
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<dependencies>
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<spec>XMPP Core</spec>
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<spec>XEP-0001</spec>
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<spec>XEP-0004</spec>
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<spec>XEP-0060</spec>
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<spec>XEP-0373</spec>
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</dependencies>
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<supersedes/>
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<supersededby/>
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<shortname>pss-ox</shortname>
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<author>
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<firstname>Jérôme</firstname>
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<surname>Poisson</surname>
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<email>goffi@goffi.org</email>
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<jid>goffi@jabber.fr</jid>
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</author>
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<revision>
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<version>0.1.0</version>
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<date>2022-12-20</date>
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<initials>XEP Editor (jsc)</initials>
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<remark>Accepted by vote of Council on 2022-11-30.</remark>
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</revision>
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<revision>
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<version>0.0.1</version>
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<date>2022-10-29</date>
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<initials>jp</initials>
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<remark><p>First draft.</p></remark>
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</revision>
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</header>
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<section1 topic='Introduction' anchor='intro'>
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<p>This XMPP extension protocol specifies a profile of Pubsub Signing to use OpenPGP for signature.</p>
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</section1>
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<section1 topic='Signing a Pubsub Item With OpenPGP' anchor='signing'>
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<p>Signing an item with OpenPGP requires to have &xep0373; implemented to handle keys, however this specification uses its own <sign/> element because it uses wrapper element from Pubsub Signing XEP, and signed data MUST NOT be included with the signature.</p>
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<p>To sign an element, a client process as explained in XEP-0XXX <link url='https://xmpp.org/extensions/inbox/pubsub-signing.html#signing'>§ Signing a Pubsub Item</link> where the "signing profile" element used is a <sign/> element qualified by the 'urn:xmpp:pubsub-signing:openpgp:0' namespace. This element MUST contain a Base64 encoded (&rfc4648; <link url='https://tools.ietf.org/html/rfc4648#section-4'>§ 4</link>) OpenPGP message as specified in &rfc4880; which MUST contain a <strong>detached signature</strong> as defined in &rfc4880; <link url='https://www.rfc-editor.org/rfc/rfc4880#section-11.4'>§ 11.4</link> of the signed data as specified in XEP-0XXX <link url='https://xmpp.org/extensions/inbox/pubsub-signing.html#signing'>§ Signing a Pubsub Item</link>.</p>
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<example caption="Juliet Publishes Her Signature as an Attachment With OpenPGP Signing Profile"><![CDATA[
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<iq xmlns="jabber:client" from="juliet@capulet.lit/chamber" to="juliet@capulet.lit" id="signature_1" type="set">
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<pubsub xmlns="http://jabber.org/protocol/pubsub">
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<items node="urn:xmpp:pubsub-attachments:1/xmpp:juliet@capulet.lit?;node=urn%3Axmpp%3Amicroblog%3A0;item=random-thoughts-12bd">
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<item id="juliet@capulet.lit">
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<attachments xmlns="urn:xmpp:pubsub-attachments:1">
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<signature xmlns="urn:xmpp:pubsub-signing:0">
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<time stamp="2022-10-16T18:39:03Z"/>
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<signer>juliet@capulet.lit</signer>
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<sign xmlns="urn:xmpp:pubsub-signing:openpgp:0">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</sign>
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</signature>
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</attachments>
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</item>
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</items>
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</pubsub>
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</iq>
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]]></example>
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</section1>
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<section1 topic='Discovering Support' anchor='disco'>
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<p>If a client supports the protocol specified in this XEP, it MUST advertise it by including the "urn:xmpp:pubsub-signing:openpgp:0" discovery feature in response to a &xep0030; information request:</p>
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<example caption="Service Discovery information request"><![CDATA[
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<iq type='get'
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from='juliet@example.org/chamber'
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to='romeo@example.org/orchard'
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id='disco1'>
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<query xmlns='http://jabber.org/protocol/disco#info'/>
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</iq>]]></example>
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<example caption="Service Discovery information response"><![CDATA[
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<iq type='result'
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from='romeo@example.org/orchard'
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to='juliet@example.org/chamber'
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id='disco1'>
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<query xmlns='http://jabber.org/protocol/disco#info'>
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...
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<feature var='urn:xmpp:pubsub-signing:openpgp:0'/>
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...
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</query>
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</iq>]]></example>
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</section1>
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<section1 topic='Security Considerations' anchor='security'>
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<p>Security considerations of &xep0373; and <link url='https://xmpp.org/extensions/inbox/pubsub-signing.html'>XEP-0XXX</link> apply.</p>
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</section1>
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<section1 topic='IANA Considerations' anchor='iana'>
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<p>TODO</p>
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</section1>
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<section1 topic='XMPP Registrar Considerations' anchor='registrar'>
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<p>TODO</p>
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</section1>
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<section1 topic='XML Schema' anchor='schema'>
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<p>TODO</p>
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</section1>
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<section1 topic='Acknowledgements' anchor='acks'>
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<p>Thanks to NLnet foundation/NGI0 Discovery for funding.</p>
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</section1>
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</xep>
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